Final answer:
The Dow Jones Industrial Average (DJIA) is an index based on the adjusted average price of stocks of 30 major corporations picked by the editors of the Wall Street Journal. It is a popular measure of the stock market performance.
Step-by-step explanation:
The subject of this question is Business and it is appropriate for High School level students.
The index that the question is referring to is the Dow Jones Industrial Average (DJIA). It is an index based on the adjusted average price of stocks of 30 major corporations picked by the editors of the Wall Street Journal.
The DJIA is a popular measure of the stock market performance and is often used as an indicator of the overall health of the U.S. stock market.